Here is the English translation of the cold-drawn steel national standard summary, with citation numbers removed:
Cold-Drawn Steel National Standard (China)
The current national standard for cold-drawn steel is GB/T 3078-2019 "High-Quality Structural Steel Cold-Drawn Bars", which replaced the previous GB/T 3078-2008 version and has been in effect since July 1, 2020.
Key Technical Requirements
- Scope: Covers cold-drawn bars (round, square, hexagonal) and cold-drawn polished round bars made of high-quality carbon structural steel and alloy structural steel.
- Key Updates (vs. 2008 edition):
- Added definitions and delivery condition codes.
- Modified hardness requirements and removed certain steel grades.
- Changed tensile strength units to MPa.
- Clarified testing methods and batch rules.
Related Standards
- Base Standards: Must be used in conjunction with GB/T 699 (carbon structural steel) and GB/T 3077 (alloy structural steel).
- Dimensional Standards:
- Cold-drawn bars follow GB/T 905-1994.
- Cold-drawn polished round bars follow GB/T 3207-2008.
Additional Relevant Standards
- Cold-Drawn Steel Types: Includes round, hexagonal, and square bars, referenced in standards such as GB/T 702 (round steel) and GB/T 3190 (aluminum alloys).
- Tool Steel Cold-Drawn Wire: Special requirements are covered in the group standard T/QGCML (released in 2025).
Standardization Authority
- Responsible Committee: National Steel Standardization Technical Committee (SAC/TC183).
- Main Drafting Organizations: Northeast Special Steel Group, Xingcheng Special Steel, etc.
For the full standard text or historical versions, refer to the National Standard Information Public Service Platform or the National Standards Full-Text Open System.
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